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ASoC: Automatically manage WM8996 MICBIAS regulating mode

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For non-audio uses like accessory detection we can use a lower quality,
unregulated microphone bias, saving a little power. As the hardware can
manually enable and disable the biases we can select regulating mode
automatically with supply widgets connected to the biases.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
This commit is contained in:
Mark Brown 2011-08-20 19:00:50 +01:00
parent e3d73c1bbf
commit 889c85c550
1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/wm8996.c
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@ -982,6 +982,8 @@ SND_SOC_DAPM_SUPPLY_S("Charge Pump", 2, WM8996_CHARGE_PUMP_1, 15, 0, cp_event,
SND_SOC_DAPM_POST_PMU),
SND_SOC_DAPM_SUPPLY("LDO2", WM8996_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("MICB1 Audio", WM8996_MICBIAS_1, 4, 1, NULL, 0),
SND_SOC_DAPM_SUPPLY("MICB2 Audio", WM8996_MICBIAS_2, 4, 1, NULL, 0),
SND_SOC_DAPM_MICBIAS("MICB2", WM8996_POWER_MANAGEMENT_1, 9, 0),
SND_SOC_DAPM_MICBIAS("MICB1", WM8996_POWER_MANAGEMENT_1, 8, 0),
@ -1142,7 +1144,9 @@ static const struct snd_soc_dapm_route wm8996_dapm_routes[] = {
{ "Charge Pump", NULL, "SYSCLK" },
{ "MICB1", NULL, "LDO2" },
{ "MICB1", NULL, "MICB1 Audio" },
{ "MICB2", NULL, "LDO2" },
{ "MICB2", NULL, "MICB2 Audio" },
{ "IN1L PGA", NULL, "IN2LN" },
{ "IN1L PGA", NULL, "IN2LP" },